Fixes for MacOS. Add MacOS to CI matrix.

[aslakhellesoy]

🤔 What's changed?

The polyglot-release script has been modified to be portable between Linux and MacOS. In particular, sed -i is no longer used since it requires an argument on MacOS, but not on Linux.

Furthermore, the tag filtering has been refactored to filter with grep rather than relying on git ls-remote. The POLYGLOT_RELEASE_GIT_REPO now has a default value: git config --get remote.origin.url.

⚡️ What's your motivation?

Release from a mac, not having to specify POLYGLOT_RELEASE_GIT_REPO

🏷️ What kind of change is this?

• :bug: Bug fix (non-breaking change which fixes a defect)

📋 Checklist:

• [x] I agree to respect and uphold the Cucumber Community Code of Conduct
• [ ] I've changed the behaviour of the code
  • [ ] I have added/updated tests to cover my changes.
• [ ] My change requires a change to the documentation.
  • [ ] I have updated the documentation accordingly.
• [x] Users should know about my change
  • [ ] I have added an entry to the "Unreleased" section of the CHANGELOG, linking to this pull request.

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[aslakhellesoy]

Any idea why the MacOS build might be failing? The tests pass fine on my mac.

[mpkorstanje]

I think:

Run ./polyglot-release-test
./polyglot-release-test: line 7: realpath: command not found